import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class Demo5 {
    public static void main(String[] args) {
        ExecutorService threadPool= Executors.newFixedThreadPool(4);
        ExecutorService threadPool1=Executors.newCachedThreadPool();
        for (int i = 0; i <1000 ; i++) {
            int id=i;
            threadPool.submit(()->{
                System.out.println("hello"+id+","+Thread.currentThread().getName());
            });
        }
    }
}
